To use Quicksilver with Snow Leopard, download version b56a7 (or later) from http://code.google.com/p/blacktree-alchemy/downloads/list.
Some plugins will not work. If you encounter crashes once you have installed b56a7, try removing Plugins.plist and the Plugins folder from ~/Library/Application Support/Quicksilver before launching Quicksilver. (Note: ~ stands for /Users/<your username>)
